Whether for home, farm, builder or industrial customers, National has all the right hardware in the size and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Thanks to a proprietary WeatherGuard finish, zinc plated eye, U-bolts and eye/eye turnbuckles last three times longer than the competition. Continued expansion of stainless steel bolts, including heavy-duty applications, put us well ahead of the competitors. Zinc plating offers corrosion resistance for all of your functional hardware needs.